Minarik RG5500U User manual

User’s Manual
Regenerative SCR Drive
Isolated-Input, Four-Quadrant,
RG5500U

Copyright  2004 by
Minarik Drives
All rights reserved. No part of this manual may be reproduced or transmitted in any
form without written permission from Minarik Drives. The information and
technical data in this manual are subject to change without notice. Minarik
Drives and its Divisions make no warranty of any kind with respect to this
material, including, but not limited to, the implied warranties of its merchantability
and fitness for a given purpose. Minarik Drives and its Divisions assume no
responsibility for any errors that may appear in this manual and make no
commitment to update or to keep current the information in this manual.
Printed in the United States of America.

Safety Warnings
•This symbol  denotes an important safety tip or warning.
Please read these sections carefully prior to performing any of
the instructions contained in that section.
• Have a qualified electrical maintenance technician install,
adjust and service this equipment. Follow the National
Electrical Code and all other applicable electrical and safety
codes, including the provisions of the Occupational Safety
and Health Act (OSHA), when installing equipment.
•Reduce the chance of an electrical fire, shock, or explosion by
proper grounding, over-current protection, thermal protection,
and enclosure. Follow sound maintenance procedures.
It is possible for a drive to run at full speed as a result of
a component failure. Minarik strongly recommends the
installation of a master switch in the main power input to
stop the drive in an emergency.
Circuit potentials are at 115 VAC or 230 VAC above
earth ground. Avoid direct contact with the printed circuit
board or with circuit elements to prevent the risk of serious
injury or fatality. Use a non-metallic screwdriver for
adjusting the calibration trimpots. Use approved personal
protective equipment and insulated tools if working on this
drive with power applied.

i

ii
Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Shielding guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Speed adjust potentiometer installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
SCCR Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Cage-clamp terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Motor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Speed adjust potentiometer connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Field output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Tachogenerator feedback (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Signal follower (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Polarity reversal switch (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
+15 and –15 terminals (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
DISABLE / ENABLE terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Slide switches (SW501–SW504) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
DIP switches (SW505) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Before applying power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Uni-directional Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Bi-directional Operation (with speed adjust pot) . . . . . . . . . . . . . . . . . . . .22
Voltage Follower . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . .23
Current Follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Starting and stopping methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Line starting and line stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

iii
Automatic restart upon power restoration . . . . . . . . . . . . . . . . . . . . . . . . .25
Coast to a stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Regenerative brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Decelerate to minimum speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
MINIMUM SPEED OUT (MIN OUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
MAXIMUM SPEED OUT (MAX OUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
FORWARD ACCELERATION (FWD ACC) . . . . . . . . . . . . . . . . . . . . . . . . . .30
REVERSE ACCELERATION (REV ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . .30
IR COMPENSATION (IR COMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
FORWARD TORQUE (FWD TQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
REVERSE TORQUE (REV TQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
DEADBAND (DB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
TACHOGENERATOR (TACH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
CURRENT SIGNAL OFFSET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
INPUT ADJUST (INPUT ADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Connection to other Minarik devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Optional speed adjust potentiometer connections . . . . . . . . . . . . . . . . . . . . .42
FWD-REV switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
FWD-MIN SPD-REV switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Independent adjustable speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Independent forward and reverse speeds . . . . . . . . . . . . . . . . . . . . . . . . .45
Independent forward and reverse speeds with a FWD-STOP-REV switch .46
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Before applying power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Unconditional Warranty . . . . . . . . . . . . . . . . . . . . .inside back cover
Contents
Line starting and line stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

iv
Tables
Table 1. SCCR Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Table 2. Field Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Illustrations
Figure 1. Four Quadrant Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi
Figure 2. RG5500U Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Figure 3. Speed Adjust Potentiometer Installation . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 4. Cage-Clamp Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 5. RG5500U Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Figure 6. Speed Adjust Potentiometer Connections . . . . . . . . . . . . . . . . . . . . .12
Figure 7. Signal Follower Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 8. Polarity Reversal Switch Connections . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 9. ±15 VDC Supply Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 10. DISABLE / ENABLE Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 11. Slide Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 12. Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 13. REGEN BRAKE Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 14. Run / Decelerate to Minimum Speed Switch . . . . . . . . . . . . . . . . . .27
Figure 15. Typical FWD TQ, REV TQ, and IR COMP Settings . . . . . . . . . . . . .34
Figure 16. Deadband Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Figure 17. RG5500U Connection to Minarik DLC600 . . . . . . . . . . . . . . . . . . . .40
Figure 18. RG5500U Connection to 200–0386A Limit Switch Logic Board . . . .41
Figure 19. Forward-Reverse Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 20. Forward-Minimum Speed-Reverse Switch . . . . . . . . . . . . . . . . . . . .43
Figure 21. Independent Adjustable Speeds (Forward Direction) . . . . . . . . . . . .44
Figure 22. Independent Forward and Reverse Speeds . . . . . . . . . . . . . . . . . . .45
Figure 23. Independent Forward and Reverse Speeds with a Forward-Stop-
Reverse Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Table 3. Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

v
Regenerative Drives
Most non-regenerative, variable speed DC drives control
current flow to a motor in one direction. The direction of
current flow is the same direction as the motor rotation.
Non-regenerative drives operate in Quadrant 1, and also in
Quadrant 3 if the drive is reversible (see Figure 1, Page vi).
Unless dynamic braking is used, non-regenerative drives
cannot decelerate a load faster than coasting to a lower
speed.
Regenerative drives operate in two additional quadrants:
Quadrant 2 and Quadrant 4. In these quadrants, motor
torque is in the opposite direction of motor rotation.
Regenerative drives can reverse a motor without
contactors, switches, brake resistors, or inhibit plugs. They
can also control an overhauling load and decelerate a load
faster than it would take to coast to a lower speed.
The RG5500U is a full-wave, four-quadrant regenerative
drive which provides smooth motoring and braking torque
for SCR brush-type DC motors. The RG5500U controls
motors from 1 through 5 Hp for single or bi-directional
variable speed.

vi
Figure 1. Four Quadrant Operation

1
Model Number RG5500U
Type Open Chassis
AC Line Voltage 115 VAC or 230 VAC, ±10%, 50Hz or 60 Hz, single phase
Line Fuse Rating 40 A (Buss Type SC–40 or equivalent)
Field Fuse Rating 3 A, fast acting
Horsepower Range @ 90 VDC Output 1 – 2.5 HP
Horsepower Range @ 180 VDC Output 1 – 5 HP
Maximum Armature Voltage Range @ 115 VAC Input 0–90 VDC
Maximum Armature Voltage Range @ 230 VAC Input 0–180 VDC
Minimum Speed Adjustment Range @ 115 VAC Input 0–60 VDC
Minimum Speed Adjustment Range @ 230 VAC Input 0–120 VDC
Maximum Peak (~ 2 sec) AC Input Current ‡ 40A AC
Maximum Continuous AC Input Current ‡ 30A AC
Maximum Peak (~ 2 sec) Armature Current ‡ 30A DC
Maximum Continuous Armature Current ‡ 27A DC
Field Voltage @ 115 VAC Input 50 VDC (F1 to L1) or 100 VDC (F1 to F2)
Field Voltage @ 230 VAC Input 100 VDC (F1 to L1) or 200 VDC (F1 to F2)
Form Factor @ Maximum Armature Voltage 1.37
Acceleration Time Range 0.5 – 8 seconds
Deceleration Time Range 0.5 – 8 seconds
Input Signal Ranges (grounded or ungrounded, isolated or non-isolated signal)
Voltage Signal (narrow range) –25 to +25 VDC
Voltage Signal (wide range) –250 to +250 VDC
Current Signal (one of the following) 1–5 mADC; 4–20 mADC; 10–50 mADC
Specifications

2 Specifications
Recommended Speed Adjustment Potentiometer †5 Kohms to
20 Kohms
Input Impedance
Voltage Signal (S0 to S2) 25 Kohms
Voltage Signal (S0 to HV) 125 Kohms
Current Signal, 1–5 mADC 1 Kohms
Current Signal, 4–20 mADC 235 ohms
Current Signal, 10–50 mADC 100 ohms
Speed Regulation (% of base speed)
Armature Feedback 1% or better
Tachogenerator Feedback 0.1%
Tachogenerator Feedback Voltage Range
7 VDC/1000 RPM to 50 VDC/1000 RPM
Weight 4.7 lb
Ambient Operating Temperature Range ‡see notes
Vibration 0.5g max (0 – 50 Hz)
0.1g max (above 50 Hz)
Notes:
†Drive shipped with 10 Kohm speed adjust potentiometer.
‡10°C–40°C when mounted flat (horizontally), or in an aluminum enclosure
whose volume is between 5 and 8 cubic feet; 10°C–50°C when mounted
upright (with heat sink fins vertical), or in an aluminum enclosure greater
than 8 cubic feet. Open chassis SCR drives are rated at 55°C.

3
Dimensions
Figure 2. RG5500U Dimensions
FOUR (4) MOUNTING SLOTS 0.19 [5] X 3.0 [8] DEEP
ALL DIMENSIONS IN INCHES [MILLIMETERS]
2.06 [52]
8.00 [203]
6.30 [160]
0.19 [5]
ARM TACH
511
032
315C
505RCS
T506
105BT
A2 A1F2
5
1-
205
B
T
2L1L
2S3
SS
C0
S1S PT
E
LB
ANE/E
LB
ASI
D
505WS
5-1
02
-4
05-01
SVFC
205C
I
305
C
6
15C
FU504
205OS
2CA 1C
A
EKARB
N
E
GER
5
1+ 1T 2T R
ID MO
C
VH J
DATUPNI
TES
F
FO
.
GI
S
RRUC
405R
TUOXA
M
105P
1
15
P
205P
205C
105
CI
105OS
5
15C
T505
505C
I
4
05CI
1
05UF
F1
305UF
3
0
5D
405D
405C
205
D
105D
50
5
C
20
5
RC
S
03
2
511
1
05
R
2
0
5
WS
205
UF
105C
105RCS
105WS
305
CI
40
5
RCS
305R
C
S
R502
SW503
90 180
ARMATURE
90
5
P
QTVERQTDW
F
405P305P
PMO
CRI
505P
CC
A
DWF
TUONI
M
705P605P
BDCCAVER
805
P
105PT
215C
HC
A
T
015P
SW504
FEEDBACK
R503
415
C
11
5C
T501
T502
T503
8
05
RC
S
705RCS605RC
S
T504
605
C8
0
5
C0
1
5C
705C905C
1 2 3 4
12.13 [308]
6.89 [175]
2.60 [66]
0.12 [3]

4
Mounting
• Drive components are sensitive to electrostatic fields. Avoid
direct contact with the circuit board. Hold drive by the chassis
only.
• Protect the drive from dirt, moisture, and accidental contact.
Provide sufficient room for access to the terminal block and
calibration trimpots.
• Mount the drive away from heat sources. Operate the drive
within the specified ambient operating temperature range.
• Prevent loose connections by avoiding excessive vibration of
the drive.
• Mount drive with its board in either a horizontal or vertical
plane. Four 0.19 in. (5 mm) wide slots in the chassis accept #8
pan head screws. Fasten either the large base or the narrow
flange of the chassis to the subplate.
Installation
Warning
Do not install, remove, or rewire this equipment with
power applied. Failure to heed this warning may result in
fire, explosion, or serious injury. Read and understand the
Safety Warnings on page i before attempting installation.
The chassis must be earth grounded. Use a star washer
beneath the head of at least one of the mounting screws to
penetrate the anodized chassis surface and to reach bare
metal.



5
Wiring
Warning
Do not install, remove, or rewire this equipment with
power applied. Failure to heed this warning may result in
fire, explosion, or serious injury. Read and understand the
Safety Warnings on page i before attempting installation.
Circuit potentials are at 115 or 230 VAC above ground. To
prevent the risk of injury or fatality, avoid direct contact with
the printed circuit board or with circuit elements.
Do not disconnect any of the motor leads from the drive
unless power is removed or the drive is disabled. Opening
any one motor lead may destroy the drive.
Use 12 AWG wire for AC line voltage (L1 and L2) and motor
armature (A1 and A2) wiring. Use 18 AWG wire for logic (S0,
S1, S2, and S3) and 16 AWG for motor field (F1 and F2) wiring.
Installation
This product does not have internal solid state motor over-
load protection.
It does not contain speed-sensitive overload protection,
thermal memory retention or provisions to receive and
act upon signals from remote devices for over temperature
protection.
If motor overload protection is needed in the end-use
product, it needs to be provided by additional equipment in
accordance with NEC standards.

6 Installation
Shielding guidelines
As a general rule, Minarik recommends shielding of all
conductors.
If it is not practical to shield power conductors, Minarik
recommends shielding all logic-level leads. If shielding logic
leads is not practical, the user should twist all logic leads with
themselves to minimize induced noise.
It may be necessary to earth ground the shielded cable. If noise is
produced by devices other than the drive, ground the shield at the
drive end. If noise is generated by a device on the drive, ground
the shield at the end away from the drive. Do not ground both
ends of the shield.
If the drive continues to pick up noise after grounding the shield,
it may be necessary to add AC line filtering devices, or to mount
the drive in a less noisy environment.
Warning
Under no circumstances should power and logic leads be
bundled together. Induced voltages can cause unpredictable
behavior.


7Installation
Install the circular insulating disk between the mounting panel
and the 10K ohm speed adjust potentiometer (see Figure 3).
Mount the speed adjust potentiometer through a 0.38-inch
(10 mm) hole with the hardware provided. Twist the speed adjust
potentiometer wires to avoid picking up unwanted electrical
noise.
Warning
Be sure that the potentiometer tabs do not make contact with
the potentiometer enclosure. Grounding the input will cause
damage to the drive.

Speed adjust potentiometer installation
POT TAB ASSIGNMENTS
WIPER
CW
CCW
SPEED ADJUST
POTENTIOMETER
INSULATING DISK
PANEL
STAR
WASHER
NUT
MOUNT THROUGH A 0.38 IN. (10 MM) HOLE
Figure 3. Speed Adjust Potentiometer Installation

8 Installation
Fusing
RG5500U drives have two 40A line fuses and one 3A field fuse
installed. These fuses do not have to be resized. Replacement
fuses may be ordered from your local Minarik Drives distributor.
See Replacement Parts section on Page 54 for the fuse part
numbers.
Drive
Model No.
Short Circuit
Current Rating
Maximum
Current,
kA
Maximum
Voltage,
V
Types of Branch
Circuit Protection
Maximum
Rating of
Overcurrent
Protection
RG5500U Non-time
Delay K5
Fuse
Inverse
Time
Circuit
Breaker
10,000 240V 30A
SCCR Rating
Short-circuit current rating (SCCR) is the maximum short-circuit
current that the speed control can safely withstand when protected
by a specific over-current protective device(s).
The rating for models rated more than 1 HP is tabulated below.
Table 1. SCCR Rating

9Installation
1. Press down on the lever arm
using a small screwdriver.
2. Insert wire into the wire clamp.
3. Release the lever arm to clamp
wire.
Figure 4. Cage-Clamp Terminal Block
Cage-clamp terminal block
Logic connections to RG5500U are made to a cage-clamp
terminal block. Refer to figure 4 for terminal block wiring
procedure.

Installation10
Warning
Do not connect this equipment with power applied. Failure
to heed this directive may result in fire or serious injury.
Minarik strongly recommends the installation of a master
power switch in the voltage input line. The switch contacts
should be rated at a minimum of 200% of motor nameplate
current and 250 volts.
Motor connections
Minarik drives supply motor voltage from A1 and A2 terminals. It
is assumed throughout this manual that, when A1 is positive with
respect to A2, the motor will rotate clockwise (CW) while looking
at the output shaft protruding from the front of the motor. If this is
opposite of the desired rotation, simply reverse the wiring of A1
and A2 with each other.
Connect a DC motor to TB501 terminals A1 and A2 as shown in
Figure 5 on Page 12. Ensure that the motor voltage rating is
consistent with the drive’s output voltage.
Power connections
Connect the AC line power leads to terminals L1 and L2, or to a
double-throw, single-pole master power switch (recommended).
See figure 5, page 12.
Connections

11Installation
Speed adjust potentiometer connections
The motor can operate in one direction (unidirectional) or two
directions (bidirectional) depending on how the speed adjust
potentiometer is connected to the drive.
Connect the speed adjust potentiometer as shown in Figure 6(a)
on Page 13 for bidirectional operation. The motor does not
operate when the wiper is in the center position. Turning the
wiper CW from the center causes the motor to rotate in one
direction, while turning the wiper CCW from center causes
rotation in the opposite direction.
Connect the speed adjust potentiometer as shown in Figure 6(b)
on Page 13 for unidirectional operation in the forward direction.
Connect the speed adjust potentiometer as shown in Figure 6(c)
on Page 13 for unidirectional operation in the reverse direction.
Refer to the Application Notes for additional speed adjust
potentiometer connections.

12 Installation
230 115
TB501
A2 A1F2
TB502
L2L1
CS
DISABLE/ENABLE
SW505
1-5
4-20
10-50
CFVS
IC502
C503
C516
FU504
SO502
AC2
AC1
REGENBRAKE
INPUTADJ
CURR SIG.OFFSET
R504
P501
P511
C502
IC501
SO501
C515
T505
IC505
FU501
F1
FU503
D503 D504
C504
D502
D501
C505
SCR502
115 230
R501
SW502
FU502
C501
SCR501
SW501
405RCS305RCS
1 2 3 4
S3 S2 S1 S0 TP -15 +15 T1 T2 HV DIR COM
Figure 5. RG5500U Connections
* Connection shown for 100 VDC or 200 VDC fields.
Note: Make no connection to TP. It is
used for test purposes only.
POWER SWITCH
115 or 230
VAC INPUT
OPTIONAL
TACH-GENERATOR
* MOTOR FIELD
SHUNT-WOUND
MOTORS ONLY
EARTH
GROUND
SPEED ADJUST
POT 10K OHMS
FWD
-
+
-
+
REV
TACH FEEDBACK
* T1 should be pos (+) and
T2 neg (-) when running in
the forward direction (A1 is +
and A2 is -).